Stapling machine



June 2,. 1936. w. G. PANKONIN l STAPLING MACHINE Filed Dec. l2, 1932 5 Sheets-Sheet l Ilm x )77 ATTORNEXS I W. G. PAN KONIN June 2, 1936.

STAPLING MACHINE 3. Sheets-Sheet 2 INVENTOR.

Filed Dec. l2, 1952 f ATTORNEY? June 2, 1936.

W. G. PANKONIN y STAPLING MACHINE Fi1 ed Dec. 12, 1932 3 Sheets-Sheet 3 vom. ,mm w@ W m auf. u mm ,n mm am, W

- w@ \\m.m 1 Wm. .www2/w.

.Q 1mm 1o ing tool eiective, when operated, vto eject a staple line IIi-III of Figure 11;

Patented June 2, 1936y I UNITED STATESy PATENT olFElcE s'rArLmG MAcHrNE William G. Pankonin, Chicago, lll. Application December 12, 1932, Serial No. 646,847

' 41 claims. (ci. 1 3) vThis invention relates to an improvement in Figure 6 is a view in horizontal section taken stapling devices of the type employed in offices for on line 6 6 of Figure 5; fastening together papers or the like. Figure 7 is a view in horizontal Section taken -The stapling device is of the type which has a on line I-l of Figure 5 base supporting an anvil provided with camming Figure 8 is a'fragmentary view in vertical sec- 5 slots designed to appropriately bend the legs of the tion taken on line 8-8 of Figure 4; staple. A staple carrying arm is mounted on the Figure 9 is a group view in elevation showing base and has means providing a magazine for the different ways of bending the staples; staples and also means supporting a staple driv- Figure 10 is a view in vertical section taken on A 10 from the magazine and to coact with the anvil in Figure 11 is a fragmentary view partly in side veffecting the stapling action. elevation and partly in vertical section showing a Among the objects of the present invention are modied means for feeding or pushing the staples to provide an improved anvil construction and through the magazine;

15 mounting to facilitate the bending of the staples Figure 12 is a fragmentary view showing the 15 in a variety of ways; to improve the mounting construction of the lower end of the staple driving of the staple carrying arm on the base; to provide tool;

' anv improved arrangement for feeding or push- Figure 13 is a group view showing in top plan ing the staples through the magazine which has Aand in edge elevation one construction of the conthe advantage, in particular, of facilitating loadnecting bar employed in the spring connection 20 ing of the magazine; and to provide for the between the staple carrying arm and the base;

mounting of the staple driving tool and its actuat-l Figure 14 is a group view showing in front and `ing plunger in a novel manner so as to render side elevation the structure providing the lower access to the staples more convenient. abutment for the plunger spring;

Another object of the invention is to provide a Figure 15 is a 4fragmentary view partly in sec- 25 Astapling device having these advantagesand cation and partly in elevation and showing on an pacities and which is simple and durable in 'conenlarged scale the mounting of the detent of the struction, reliable and eiective in operation and full stroke insuring means; and easy and comparatively inexpensive to manufac` Figure 16 is a fragmentary view partly in side ture. elevation and partly in longitudinal vertical sec- 30 Other objects and advantages reside in certain tion and illustrating the) means employed for prenovel features of the construction, arrangement venting distortion of the body portions of the staand combination of parts which will be hereinples during the driving and clinching thereof.

after more fully described and particularly point- Referring to the drawings, it will be seen that ed out in the appendedclaims, reference being the stapling device comprises generally a base I 35 had to the accompanying drawings forming apart on which an anvil 2 is secured. At the end of of this specication, and in which: the base opposite the anvil a mounting desig- Figure 1 is afview in side elevation showing a nated generally at 3 is provided for the beam or stapling device embodying the present invention, staple carrying `arm designated generally at 4.

parts being-broken away and shown in longitudi- The staple carrying arm is constructed to pro- 40 nal vertical section for the sake of illustration; vide a magazine designated generally at 5 for the Figurez is a view in transverse vertical section staples S. T he end 0f the arm overlying the taken on line 2--2 of Figure 1; Y anvil 2 is provided with a main housing 6 con- Figure 3 is a view in horizontal section talren on Structed t0 provide a Support and guidingmeans line 3-3 of Figure 1; Y for the staple driving tool designated generally at 45 Figure 4 is a plan view of the base with the 1 audits actuatmg plunger s' The base I consists of a metallic plate-like poranvil and staple arm mounting thereon, the staple tion In of inverted dished form the marginal carrying arm and parts associated therewith be' edges of which are received within and conned ing removed for the Sake 0f musmtion; flan e II of a bottom I2 of cushionin 50 Figure 5 is a fragmentary view in sideelevagagal g g tion illustrating the construction of the forward The anvil 2 comprises a plate-like member I3 end 0f the Staple Carrying arm, Darts being 'DI'Oken of approximately triangular form. Camming away and portions being shown in Section for the grooves I4, I5 and lel are provided in the upper 55 sake of illustration; surface of the anvil and are of Vdifferent shape or 55 base. The intermediate portion of the anvil plate utilized the staple-will be bent as indicated at I1 in Figure 9. When another is utilized the staple will be bent as indicated at I8 and I8' in Figure 9 in the metal plate Ill of the base. 'I'he stud '28 has a U-shaped'spring 22 suitably fastened thereto. 'I'he ends of the spring project beyond the slot 2| and are tensioned to bear against the underside of the plate Ill of the base in such manner as .to hold the anvil rmly against the I3 is provided with a slot 23j angled or shaped as shown. A headed rivet or fastening member 24 is secured to the base plate I8 and has its head overlapping the margins of the slot 23, the shank of the rivet or stud being a sliding 't in the slot 23. The forward end ofl the anvil plate'is provided with a reduced flange 25 which is overlapped by a holding tongue 26 struck up from the base plate III. With this construction they anvil plate may be shifted transversely and longitudinally to bring any particular one of the camming slots into cooperative relation with the driving tool of the stapling device. To maintain the selected slot in operative relation to the staple driving tool,

, the underside of the plate is provided with spaced recesses 21, 28 and 29, with which a ball or detent 30 is selectively engageable.' The ball 30 is pressed upwardly by a spring 3l through an opening 32 in the base plate I0 and snapping into the recesses 21, 28 or 29v which'is alined therewith. An insert 33 is interposed between the cushioning bottom I2 and the portion of the plate I9 which underlies the cari'iming slots of the anvil to render Y the anvil rigid and preclude fiexurex In lieu` of an insert, a structure corresponding thereto and integral with vthe bottom l2 may be employed, if desired.

The action of the camming slot I4 in forming the hook I9 on the staple is enhanced by means of a flat spring strip 34, a portion of which is riveted as at 35 to the anvil plate I3` and a portion of which overlies the hooked or curved portion I9 of the camming slot I4.

' 'The mounting for the staple carrying arm consists of an inverted U-shaped bracket'36, the legs of which are riveted as at 31 to the base platey I9. i The staple carrying arm comprises an invented channel-shaped core 38 and a single strip of sheet metal folded about the core 38 fromone end thereof, as clearlyV shown in Fig. 6. Elongated portions of the sheet lie` along the opposite sides of the core 38 and provide side plates 39. The

upper edges of the side plates are formed with.

inturned flanges 39. The central portion of the sheet (connecting portion of the elongated portions) lies adjacent the said one end 4of the core 38 and defines a front wall 'I I, for purposes later to' be described. Other portions of the sheet con- .ncted to the elongated portions Vand central por- 'design so that when one camming groove is other suitable manner.

The core 38 and side plates 39 overlap the mounting bracket 36 (Figures 1 and 2) and are pivotally connected thereto by means of al pivot pin 42. The portions of the side plates 39 adjacent the mounting 36 have integral extensions secured to the core 38 by spot welding or I or arms 43 which project down through slots 44 in the base plate I0 into the space 45 formed I0 and the bottom 10 between the base plate I2. The lower ends of these extensions or arms .43 are notched as at 46, the notches 46 providing seats for a cross bar 41 which extends transversely between the arms or extensions 43 and which is connected to one end of a retractile coil spring 48, the other end of the spring being anchored to a lug 49 struck down from lthe base' plate I 0. The action of the spring 48 is to yieldably hold the staple carrying arm 4 in spaced relation to the anvil and thus permit of convenient insertion of the papers to be stapled in between the arm and the anvil. However, the spring 48 readily yields to allow the arm 4 to swing downwardly v.toward the anvil when the pressed. In order to limit or x the distance that the staple carrying arm 4 is manually spaced .from the anvil, notched stops 5I are secured to and depend from the base plate I0 and engage plunger whichactuates the driving tool is de- 25 the 'cross bar 41 to limit the extent which it may 3 0 move to the left as viewed`in Figure 1 and consequently limit the extent to which the staple carrying arm is swung away from the anvil under the influence of spring 48. However, the arm 4 may be swung further away'from the anvil by hand, 35

' the notched lower ends of the extensions 43 merely swinging away from the bar 41 which at such time is held stationary by virtue of its engagement with the notched stops 5I. lSlots 44 are of sufficient length to allow the desired manual 40 movement of the arm 4. As soon as the operator releases the arm 4 it swings by gravity back toward the anvil until its extension 43 again engages the bar 41.

If desired, the bar 41 may be constructed as 45 shown in Figure 13 wherein it is made up oftwo plate-like sections securely fastened together and formed with bearings 4'!a receiving adjustable screws 411J positioned to engage the lower ends of the extensions 43. The adjustment of the screws 50 41h determines the distance the arm 4 is spaced from the anvil. Preferably the screws 41h are a tight friction iit in the bearing 411 so as to be .-held in any adjustment. In this construction the plates making up the bar 41 may have alined 55 notches41 adjacent the ends of the bar and positioned and designed to intert with the notches of the stops 5I and thereby insure a positive sto structure.

The main housing 6 has side walls 55 formed as 6U integral extensions of the side plates 39, there being curved connecting portions 56 between these side walls and the side plates 39, as illustrated in Figure '7. The upper portions of the side walls 55 are connected by a front portion 51 but below G5 rear thereof is enclosed by a closure plate 59 7o having ears 60 overlapping the side walls 55 and being secured inv position by a rivet 6I. 'o The plunger 8 which actuates the driving tool has an upper section 62, a lower-section 63 and an intermediate section 64 all formed of a single 75 ders 1l are formed. In the assembly the narrow vstaple driving and clinching operations.

piece of metal. The upper end o'f the upper section 62 is of complete tubular formation but below this upper end portion, the front of l the upper section is cut away as shown. This provides a stop shoulder 62 engageable with the upper edge of the front portion or wall 51 of the housing to limit the downward movement of the plunger. A cap or head B3 is fastened in any suitable way to the upper end of the upper section 62 to facilitate operation of the plunger. The intermediate section 64 is also of complete tubular formation and is shaped in cross section as shown in Figure 3. The upper edge of the front part of this intermediate section 64 provides a stop shoulder 64a engageable with the lower edge of the front wall 51 of the housing to limit the upward movement of the plunger. The lower section 63 of the plunger is closed at the front but open at the rear and has marginal flanges 66 along its edges, the front faces of which are overlapped and enga'ged by the anges 53 of the housing andthe rear faces of which ride on bearing or guide projections 69 pressed out of the upper portion of the front wall member 1I which is integral with and extends transversely vbetween the forward ends of the sideplates 39.

The staple driving tool 1 Vhals itslower or driving blade portion wider than its upper attaching or shank portion and at the juncture of the wide blade portion and narrow shank portion shoulshank portion of the driving tool is tted up in the intermediate section 64 and upper section 62 of the plunger and is held atly engaged with the inner faces of the rear walls of these sections by a rivet 65, the shoulder 1* ot the tool rmly abutting against the lower end of the intermediate section whereby the driving tool is positively backed up. 'Ihis is especially advantageous as it provides the positive `interconnection between the plunger and the driving tool so desirable to take care of the strains and stresses set up during the 'I'he wide driving blade portion of the tool 1 travels in a guide-way 10, the upper portion of which is dened by the front wall 1I 'and the forward ends of the curved connecting portions 56, the latter being properly spaced from the wall 1| to effect this backing up or guiding ofthe driving tool and the lower portion of which guide is defined bythe same wall 1I and the forward end of the core 38.

Integral with the wall member 1 I and extending upwardly therefrom is a bracket 12 which pro-V vides an abutment for the lower end of a spring 14. 'Ihe spring 1t extends up through the plunger and at its upper end encircles the centering pin 15 carried by the cap 68, the extreme upper end of the spring abutting the underside of the cap. The spring is tensloned to urge the plunger to its uppermost position but when the cap 68 is pushed downwardly the spring 14v is compressed to permit of downward movement of the plunger and staple driving tool. To complete the guiding of the plunger a guide roller 18 is provided and is mounted for rotation o'n the rivet 8l and bears against the fiat back of the intermediate. section 64 and upper section B2 of the plunger.

Means is provided for preventing return movement lof thefplunger to its uppermost position unless` it has completed a full downward stroke and this means consists of a row of teeth 11 provided on the back of the upper portion of the plunger and cooperable with a detent 13 rotatably mounted on a spacing collar 61* provided on the rivet pressed the teeth 11 displace the projectionV 80, against the action of its spring, to a position 6l between the adjacent end of the roller 16 and wherein it declines downwardly and towards the teeth and hence is effective to preventupward movement of the plunger although freely permitting downward' movement. When the plunger has been completely depressed or has been moved downwardly through a complete down stroke the upper ends of the row of teeth 11 pass below the projection 8D and the spring 19 returns the projection to its horizontal position, in which posi.-

-tion it plays freely over the teeth 11 during the return movement of the -plungen The detent acts in a similar manner to prevent a down stroke until after the plunger has been fully elevated.

Means is provided for preventing deformation of the body portionsofthe staples as they are being driven bythe staple driving tool and consist of a supporting member Il pivotally mounted by means of a pin 32 on the side members of the core 38. The member Il ordinarily occupies the position shown in dotted lines in Figure 1 wherein it is held against a stop pin 31" under the inuence of a spring 86,v one end of which is anchored as at 86 to a lug struck from one of the side members of the core 33 and the other end of which is connected as at 81 to an arm integral with the member.3l.

The supporting member 3| isprovided at its forward end with an upper narrow tooth 84 and a lower vand somewhat widerv tooth 83, the teeth being separate by a slot 83* designed to have a 'gauge nt over the body portion of a staple. When a staple is driven dow'n through the guide-way 10 its body portion clears or passes freely by the upper tooth 3l but engages Vthe tooth 83 which projects into the guide-way. As the staple con- ,tinues to descend under the influence of the driving tool, the supporting member is swung about its pin 82 and the upper tooth 8l overlaps the body portion of the staple so that the body portion of the staple is now firmly held and supported by the teeth 33 and 84. The supporting action becomes effective before the legs of the staple contact the material and remains effective during the driving o1 the staple into the material and until theflnalphasesofthedriving and clinching when the supporting member releases and clears the staple to allow it to be fully and completely driven and clinched without interference by the supporting member. In such nal phases of the stapling action the supporting memberhas swung on its pin 82 until the tooth 83 has moved out of the path of movement of the body portion of the staple. Upon return of the driver 1 to v itsv upward position the wider portion of the tooth 33 engages the underside of the driver 1 and the member 3l rides along with the driver until repin ll.' The tooth 33 is also madel'wider than the tooth 3l so if the plunger is operated downward and no staples are in the stapling machine,-

the driver will contact this wider portion of tooth stored to its upward position against the stop 83 and carry the member Il downward allowing "ilv were allowed to enter the clearance slot I the tooth 84 would wedge against the driver and jam thev machine.

Means is provided for pushing or feeding the staples through the magazine and may'consist of a follower or pusher shaped to conform to and slide through the magazine and having its body portion raised as at 9| and riveted or otherwise suitably attached to a'nger piece 93. The linger piece has transverse members l94 which are slotted to receive a mounting bar 95, the finger piece and follower being freely slidable along the mounting bar 95. 'I'he forward end of the mounting bar 95 is pivotally connected as at 96 with the sidewalls 55 of the main housing 6... The rearward end of this mounting bar` is curved back upon itself as at 91 and this rear end portion carries an expansible coil spring 98, one end of which engages a xed collaror abutment 99 pinned or otherwise secured on the mounting bar, and the other end of which engages one of the transverse members 94 of the finger piece. The spring 98 is tensioned to exert a push on the nger piece and consequently on the followerfll thereby eiecting feeding of the staples through the magazine. The curved form of the bar allows of the use ofan appropriately long spring in a desirably compact construction.

When the magazine is to be loaded, -the operator grasps the finger piece 93 and retracts it back along the bar 95 against the action of the spring 98. The rear transverse member 94 of the nger piece snaps into engagement with the hook |00 of a latch member |0| pivotally mounted on the curved end of the mounting bar and biased by its weight into latching position. When the 1inger piece is so latched the follower is moved back to' a position where it is rearwardly of the side plates 39 of the magazine. Consequently it may freely move upwardly with the bar 95, when the bar is raised for the purpose of affording free and easy access to the magazine for loading the same with staples or for other purposes.

A modified form oi staple feeding means is shown in Figures 10 and 11. In the modified form a pivoted'mounting bar designated at 95" is provided and corresponds to the bar 95. A follower designated at 90 is also provided and corresponds to the follower 90. In lieu of the finger piece 93 a housing structure |05 is' provided and has its base riveted as at |06 to the follower and has a longitudinal` opening extending there` through to receive the mounting bar 95'. The

upper surface of the bar 95 isformed with a rack lill, with which a pinion |08 mounted for.

rotation within the housing meshes. A'I'he pinion |08 meshes also with a gear wheel |09 secured to and rotated with a shaft i I0. The shaft H0 is driven by a spring motor. For example, it may be connected to one end of a coil spring and the opposite end of the spring is anchored as at Ii 2 on the housing. The arrangement is such that the spring is wound by a movement of the housing V'rearwardly on the bar 95' and its tendency to unwind results in the applicationof driving torque to the shaft H0, the gear wheel |09 and the pinion |08 whenever there is occasion flor feeding. As the gear wheel |09 rotates under the influence of the spring it rolls along the rack formed on the upper part of the bar 95' and consequently pushes the housing andthe foilower 90" to the left as viewed in Figure 11.

In operation, the papers to be fixed together or stapled are placedon the anvil beneath the staple carrying arm. vPrevou'sly, the anvil has been adjusted to bring the desired camming groove into operative position. The person using the device then presses down on the capor head 88. 'This causes the staple driving tool to move downwardly and engage and drive the staple which lies in its-path of movement. Under the ^iniluence of the driving tool and of the anvil the staple penetrates the papers and is properly bent or shaped. During the driving of the staple its body portionisheld against bending inthe manner pointed out. Y

In th'e event a crooked or bent staple is advanced through the guide-way 10 it is straightened unless too badly bent or deformed. In the latter event it is Asevered into pieces and is ejected from the machine. For thispurpose the (forward ends of the sides of the core are oiset or pressed outwardly against the inner faces of the side plates 39 as indicated at 40 in Figures 5 and 6. These offset portions 40' are cut away on an incline as at H5 to provide inclined camming surfaces', the lower edges of which are effectlve as cutting'edges. Ordinarily the bent leg of a staple striking the inclined surfaces of the cut-outs H5 will bebent back to proper shape and 4at the same time properly positioned in the guideway l0 but if the stapleis too badly bent, as indicated at S' in Figure 5, the driver will coact with cutting edges at the lower ends 'of the inclines to sever the bent staple into pieces. Adjacent the cut-out ||5 the side plates 39 are formed with the openings I6 through which the severed legs of such a badly bentstaplewill fall. 'I'he body portions of such severed staples are driven out through the guide-way 10.

A somewhat special action is involved in bending a staple intov the shape designated at i9, lI9' in Figure 9. To eilect such bending the staple driving tool coacts with cam slot le. The slot I4 is designed to bend the legs ofthe staple outwardly after these legs have been driven through the material and into the slot. staple remains straight when viewed from above. The slot in which this leg enters has a square shoulder at its outer end as is clearly shown in Figure 8. The 'purpose of this shoulder is to prevent the body 'portion of the staple from shifting toward the straight leg side under the iniiuence of the reaction set up by the special bending action of the other leg. The leg to be hooked slides Aunder the flexible member 38 and into the hooked end |9a (when viewed from above) ofthe slot i4, aS. is 4Shown in Figure 4. The hooked end of the slot i4 imparts to this leg a' hooked shape like thatshown in Figure 9. An additional strain is set up in bending the hooked leg, especially toward the latter part of'the downward movement of the driving tool, which has a tendency to cause the staple to shift toward the straight leg side: As explained above thisis ofiset by the shoulder at the end of the straight leg slot. It is to be understood that the same sized staple isutilized in this particular action as is used when forming the staple as viewed in l1, il and I8, I3 of Figure 9. It is only the leg por- One leg of the tions of the staple after entering through the material which-are formed as described. The member 34 in cooperation with presser flange 39a (Figures 7 and 8) carried by the side plates 39 acts as a cover plate .for the hooked end of the camming yslot and prevents the staple leg from over-riding the slot during the forming action. After the staple has been completely driven and formed and vthe staple arm returned to its upward position, the member 94 will'readilv release 75 the staple from the slot by pulling forward and upward on the material.

y While I have shown and described constructions in which the invention may be embodied, it is to be. understood that these constructions have been selected merely for the purpose of illustration and various changes may be made incthe size, shape and arrangement of the parts without departing from the spirit of the invention or the scope of the subjoined claims.

The invention claimed is:

1. A stapling device comprising a base, an anvil thereon, an arm mounted on said base and having means providing a magazine for staples, a housing carried by said arm, a staple driving tool slidable in said housing, a plunger disposed forwardly in-said housing, said tool having a portion enclosed by .said plunger and connected thereto and a spring in said plunger disposed forwardly of said driving tool for urging said plunger and driving tool to elevated position.

2. A stapling device comprising a base, an anvil thereon, an arm mounted on said base and having means providing a magazine for staples, a housing carried by said arm, a staple driving tool slidable ,in said housing, a plunger disposed forwardly in saidhousing and connected to said tool for operating the same, a spring disposed in said plunger forwardly of said driving tool for tool for operating the same, a spring disposed. forwardly of the plunger for urging said plunger and driving tool to elev ed position, a follower for feeding the staples through said maga' zine, a bar pivoted to the housing and along which the follower is slidable, andspring means-'for` urging the follower along said bar in combination with means for latching the follower in retracted position and out of the magazine whereby it may be swung with the bar away from the magazine to facilitate access thereto.

4. In ak stapling device of 'the type having a magazine for the staples, a follower for advancing the staples through the magazine, a pivotally mounted bar interconnected with the follower and along which the follower is slidable, said bar having one end reversely bent, a springA encircling said reversely bent end and having one end engaging the follower, and an abutment on the bar for the other end of said spring.

5. Astapling device comprising a base, an anvil thereon, an arm having means providing a magazine for the staples, a staple driving toolV pivotally mounted on the base and having means providinga magazine for the staples, a staple driving tool mounted on said arm. an anvil shiftably mounted on the base and having a plurality of sets of camming slots selectively cooperable with the staple driving tool depending upon the position of the anvil, means controlling the shifting movement of the anvil including a stud connected to the anvil, said base having a longitudinal slot cooperable with such stud andl a. second stud connected to the base, said anvil having an angular slot cooperable with said second stud, and means for reieasably securing the anvil in adjusted position.

'7. A stapling device comprising a base, an arm pivotally mounted on the base and having means providing a magazine for the staples, a staple driving tool mounted on said arm, an anvil having a plurality of setsof camming slots selectively cooperable with said tool depending upon the position of the anvil, means interconnecting the anvil and the base whereby the anvil is 'slidable longitudinally and transversely with respect to the base, and means for releasably seeming the anvil in any selected adjustment.

8. .In a stapling machine, an anvil having a camming' slot, one end of said slot being curved to form a hook-shaped outline and a yieldable holding element immediately overlying and covering said end.

9. A stapling device comprising a staple carrying arm, a housing thereon, a staple driving tool slidably mounted in said housing, a hollow plunger connected to said staple driving tool and arranged forwardly in said housing, said plunger having upper and lower portions and an intermediate portion, the upper portion opening forwardly and the lower portion opening rearwardly, a spring for elevating the plunger and extending through the portions thereof, and means on` th housing for guiding the plunger.

10. A stapling device having means for driving the staple, and means for preventing deformation of the body portions of the staples during driving and comprising a shiftably mounted supporting member having a slot receiving and supporting the body portion of the staple during the staple'driving action, said memberbeing shiftable out of the way of the staple in the nal phases of the driving action.

11. In a. stapling device, staple driving means comprising a hollow reciprocal plunger, a housing for said plunger, a driving tool mounted in said housing, and spring means for urging said plunger in elevated position, saiddriving tool having a' .narrow portion enclosed by said plunger, said narrow portion and said driving tool deflning a shoulder abutting said plunger to form a supporting means for said driver during its staple driving operation.-

12. In a stapling device, staple driving means A comprising a hollow reciprocal plunger, a housing forming, guiding means for said plunger, a driving tool -"attached to said plunger, said plunger having a portion of its lower rear section reymoved, said driving tool closing said portion and a spring for elevatingsaid plunger mounted between said driving tool and the front face of said plunger. Y

13.- In a stapling device, stapledriving means comprising a hollow reciprocal plunger, a housingproviding guiding means for said plunger,

l said plunger having a top portion andan intermediate section of full enclosing cross section and upper and lower portions of part enclosing cross section, a cap piece mounted upon said top portion and a driving tool connected to said plunger, said housing coacting with said top portion and said intermediate section to limit the movement of said plunger.

14. In a stapling devicestap1e driving means comprising a hollow reciprocal plunger, a housing for said plunger, a spring within said plunger to retain it in raised position, said plunger having a cross section shaped with side and rear sections forming a U-shape, a front section. having a portion approximately at right angles to said side sections and an outwardly rounded portion forming a clearance space for said spring and means on said housing coasting with said side and rear sections and said irst-,namedl portion of said front section for guiding said plunger. l5. In a stapling device having a reciprocal plunger, a housing providing guiding means for said plunger, a full stroke mechanism comprising a rack carried by said plunger and a detent carried by said housing, and a roller mounted within said housing forming .one of the guides for said plunger,'said roller cooperating with said housing to guide said detentA in alinement with said rack.

16. In a stapling device having a reciprocal plunger, a housing for said plunger, said housing having means for guiding said plunger during its reciprocation and including a single roller rotatably supported within said housing.

' 17. In a stapling device, a base having an anvil,

a beam magazine movably mounted to said base,

said magazine comprising a core forming a staple track and a one-piece sheet metal member formed about said core to guide the staples thereon, said member having extension members extending through said base and spring operated means cooperating with said extension membersto elevate said beam magazine in a spaced relation to said anvil.

13. In a stapling'devlce, a base having an anvil,

a beam magazine movably mounted to said base, said magazine comprising a core forming a stapletrack and side plates for guiding the staples on said track, said side plates having extension members, spring operated means cooperating with said extension members to elevate said beam magazine in relation to said anvil andadiustable means cooperable withsaid extension members totvary the relation of said beam magazine to said anvil.

19. Inastapling machine of the type specied, a base having an anvil, a staple carrying arm comprising an' inverted-channel shaped core and staple retaining means thereon to provide a. magazine for staples, a staple driving means carried by said arm and a' mounting bracket for said arm Asecured to said base, said core overlapping said f bracket and pivotally connected thereto whereby said bracket andcore coact to aline said'anvil and said driving means.

20. 'In a stapling device having a staple driving tool and a beam magazine for staples comprising an inverted U- shaped core forming a staple track and 'side plates, -'and a housing for said staple driving tool carried by said magazine,said core -having the i'orward ends of its sides cut away on an incline to vprovide cutting edges cooperating with `said driving tool to sever. crooked or. misplaced staples on said track and openings in said sideplates. for discharging severed staple sections.

21. In a stapling device, a base, 'an anvil on said base, staple driving means carried by said base, said anvil having a plurality of staple detorming cavities and means for locking said anvil in relative positions on said base, said anvil being movable longitudinally and transversely to aline said deiorming cavities with said staple driving menus.

22. In a stapling device, a base,- an anvil having aplurality of dei'orming cavities on said base, staple driving means carried by said base, said anvil being shiftable longitudinally and transversely to aline said deforming cavities with said staple driving means and a camming arrangement for controlling the longitudinal and transverse movement of said anvil.

23. In a stapling device having staple driving means, a base, a shiftable anvil having a plurality of staple deforming cavities mounted on said base, said anvil having a slidable pivotal connection at one end and an overlying member providing-guiding means for another end whereby said anvil is shlftably secured to said base.

24.V In a stapling device, a base, a shiftable anvil having a plurality of stapledeforming cavities mounted ilatwise` on said base, staple driving means carried by said base, means shifting said anvil longitudinally when 'said anvil is shifted transversely to align saidcavities with said driving means and locking means between said base and said anvil comprising a spring-operated ball carried by one of said members and recesses carried by the other of said members to releasably lock said anvil in relation to said staple driving means.

25. In a stapling device `having staple driving means comprising a plunger land a staple driving tool, a housing for said plunger and said tool, an ejection chute through which the staples are driven, supporting means engageable with the top and bottom of the body portion of a staple movably mounted and extending into said ejection chute and a cut-ouil portion in` said driving tool to accommodate said supporting means.

26. In a staple driving device having a staple driving tool, supporting means to prevent the bridge portions of staples from buckling as they into material, one of said teeth of said supporting means being wider than its opposing tooth.

28. In a stapling machine of the type specified, a staple magazine, an ejection 4chute through which staples are driven from said magazine, a

housing positioned on` said magazine over said forming a rear guide for said `plunger and a forward guide for said tool.

29. In a stapling machine of the type specified, a staple magazine consisting of a core provided with top and side staple guiding means providing'an enclosed run-way for staples, said magazine being open at its ends for the entrance and discharge of staples, a bar pivotaliy mounted outside of said magazine, a follower slidably interconnected with said bar, said follower having aportion slidable within said magazine and on' said core for advancing stables through said magazine, andspring means acting between said follower and said bar whereby said portion is urged to advance staples.

30. In a st'apling machine of the type specified, a staple magazine consisting of a core provided with top and side' staple guiding means providing an enclosed run-way for staples, said magazine being open at its ends for the entrance and discharge of staples. a bar pivotally mounted outside of said magazine, a follower slidably interconnected with said bar, said follower having a portion slidable within said magazine and on said core for advancing staples through said magazine, spring .means acting between said follower and said bar whereby said portion is urged to advance staples and latch means on said bar engageable with said follower for holding the same in retracted position and out of said magazine whereby said follower and bar may be swung away from said magazine to facilitate loading thereof. y

31. In a stapling machine of the type specified, a staple magazine consisting of a core provided with tcp and side staple guiding means providing an enclosed run-way for staples, said magazine being open at its ends for the entrance and discharge of staples, a bar pivotally mounted out-` side of said magazine, a followerl slidably interconnected with said bar, said follower having a portion slidable within said magazine and on said core for' advancing staples through said magazine, and spring means coiled about said bar and having one end engaging the follower and the other end engaging the end of said bar oppositeA said pivotal mounting.

32. In a stapling machine of the type specified, a staple magazine consisting of a core provided with top and side staple guiding means providing an enclosed run-way for staples, said magazine being open at its ends for the entrance and discharge of staples, a bar pivotally mounted outside of said magazine, said bar having one end reversely bent and providing an abutment, a follower slidably interconnected with said bar and having a portion slidable within said magazine and on said core, and a spring lencir- .cling said reversely bent end and having one end connected with said bar, said follower having a portion slidable within said magazine and on said core for advancing staples through said magazine, and a spring propelled motor canied by said follower and acting on said bar for advancing said portion through said magazine.

34. In a machine ofthe type specied, a core. a single strip of sheet metal folded about said -core from one end thereof, elongated portions of said strip coacting with the sides of said core to define a magazine for staples, the connecting portio of said elongated portions being spaced from an coacting with the said one end of said core to form an ejection guideway for staples being 'driven from said magazine and staple driving means positioned on said'magazine, saidmeans being guided by said ejection guideway and operable to drive staples from said magazine.

35. In a machine of the type specified, a core,

a single strip of sheet metal folded about said core from one end thereof, elongated portions of said strip coacting with the sides of said core to define a magazine for staples, the connecting portion of said elongated portions being spaced from and coacting with the said one end of said core to form an ejection guideway for staples being driven from said magazine, still other portions of said strip being integrally connected with said elongated portions andforming the walls of a main housing and staple driving meansv carried by said main housing, said means being guided by said ejection guideway and operable to drive staples from said magazine.

36. In a machine of the type specified, a core, a single strip of sheet metal folded about said core from one end thereof, elongated portions of said strip coacting with the sides of said core to define a magazine for staples, the connecting portion of said elongated portions being spaced from and coacting with'the said oneend of said core to form an ejection guideway for staples being driven from said magazine, said connecting portion having an upwardly projecting bracket integrally formed thereon, a staple driving tool operable in said ejection guideway for driving staples from said magazine, a'plunger for operating said tool and a spring for urging said plunger to elevated position, said spring having one end guided and can'ied by said bracket and the other end engaging said plunger.

37. In a machine of the type specified, a upon which staples ride in straddle fashion, a single strip of sheet metal folded about said core from one end thereof, elongated portions of said strip coacting with said core to dene side plates guiding staples on said core, said plates having inturned flanges providing a top guide for staples on said core, the connecting portion of said elongated portions being adjacent and spaced from the said one end of said core and coacting therewith to define an ejection guideway for staples being driven from said core, still other portions ing, said walls being integrally connected with said fianges for a portion of the length thereof 1 by curved portions, said curved portions being spaced from and coacting with said connecting portion to form a tool guide, a staple driving tool operable in said tool guide to drive staples from said core out through said ejection guideway and a plunger operably supported by saidA main housing and secured to said tool for operating the same.

38. In a machine of the type specified, a core, a single strip of sheet metal folded about said core from one end thereof, elongated portions on said strip coacting with said core to form a magazine for staples, the connecting portion of said elongated portions being adjacent and spaced from the said one end of said core and coacting therewith to form an ejection chute for staples being driven from said magazine, still' other portions of said strip extend upwardly from said elongated portions and form the walls of a main housing positioned above said ejection chute, a staple driving tool operable to drive staples from said magazine and out through said ejection chute and a plunger for operating said tool, said plunger being slidabiy guided by the inner surfaces of-'said walls of the main housportion. A

39. In a stapling machine of the type specified, a staple magazinel consisting of a core provided Cil ' of said strip forming the walls of a main hous- Y ing and by the outer surface of-said connecting with top and side staple guiding means providing an enclosed run-way for staples, said magazine being open ,at its ends for the entrance and discharge of staples, a bar pivotally mounted outside of said magazine, a follower slidabl;1 interconnected with said bar, said follower having a portion slidable within said magazine and on said core for advancing staples through said magazine, said bar being provided with a reversely'bent end, abutment means carried by said end, and

, spring means encircling said reversely bent end and acting between said abutment and follower whereby said portion is urged to advance the staples. y

40. In a stapling machine of the type specified, a staple magazine consisting of a core provided with top and side staple guidingmeans provid# ing an enclosed runway for staples, said magazine being open at lts ends for the entrance and discharge of stap1es,ra bar pivotally mounted outloupes side oi' saidmagazine, .a follower slidably interconnected with said bar, said follower having al advancing the follower through the magazine.

4l. In a stapling machine having a staple driving means and a beam magazine, a core having shoulders extending longitudinally thereof and defining a staple track, said core having projections at spaced intervals along the length thereof, and side plates mounted against said projections and-in spaced relation to said track to guide the staples thereon, said side plates and projections providing openings between said side plates and said core permitting discharge of foreign substance from said magazine.

WILLIAM G. PANKONIN. 

